diff --git a/requirements.txt b/requirements.txt
index 715e6a2..b219602 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,7 +9,7 @@ certifi==2017.7.27.1
 cffi==1.10.0
 chardet==2.3.0
 colorama==0.3.7
-cryptography==1.9
+cryptography==3.2
 customerio==0.1.11
 decorator==4.0.10
 defusedxml==0.4.1